Fix agent Azurite Tables endpoint; add engineering plan

Added AgentAzureTablesContainerEndpointFixPlan.md detailing diagnosis and solutions for agent startup failures with Azurite Tables in Aspire dev environments. Updated Program.cs to launch Azurite with --disableProductStyleUrl and ensure agent waits for all storage resources, improving reliability and startup sequencing. Plan covers async resource init, emulator config, retry logic, and persistent container handling.

Author: ADefWebserver